GE ZTX manual GE Zenith Controls, Control Connections

Installation (cont’d)

DANGER

HAZARDOUS VOLTAGE

(Can Cause Severe Injury or Death)

Turn OFF all power before installation, adjustment, or removal of transfer switch or any of its components.

Control Connections

Connecting Engine Start may cause Generator to start. Before connecting, turn Generator OFF.

With the Generator breaker open and the Generator control switch off, install the Generator start connections.

Note:

N = Utility Position

E = Generator Position

JP

Battery

Connection

Figure 2

The engine-start terminals are clearly identified by a label on the microcontroller backplate. In the case of manual transfer switches, or in other applications not requiring the microprocessor, clearly marked terminal blocks are provided in the upper left corner of the control panel for the engine start control wires.

Terminals for field connections to the A3 Emergency auxiliary contacts and the A4 Normal auxiliary contacts are also provided. These terminals are clearly marked and appear on the side of the power panel. On 400 amp metal frame units these terminals appear on the bracket above the operator handle.

g GE Zenith Controls

SERIAL NUMBER:
RATING: VOLTS -
	HZ -
AMPS -
	PHASE -
SYSTEM VOLTS:
MODEL NUMBER:

Figure 4

Manual operation is possible for maintenance purposes only. Manual operation of the switch can be checked before it is operated electrically.

With all power off, insert a Phillips screwdriver or equivalent size tool into the manual operator socket and operate the transfer switch between the Utility and Generator positions. The transfer switch should operate smoothly without binding. Return the switch to the Utility position, remove the screwdriver.

Tightening Torque for Lugs

Socket Size		Torque
Across Flats	Lb. - In.		Lb. - Ft.
1/8	45		4
5/32	100		8
3/16	120		10
7/32	150		12
1/4	200		17
5/16	275		23
3/8	375		31
1/2	500		42
9/16	600		50

Table 2

Figure 3

■ GE Zenith Controls ZTX Operation and Maintenance Manual (72R-1000) 3 ■